Abstract

Uncoupling between molecular and morphological evolution is common in many animal and plant lineages. This is especially frequent among groups living in ancient deep lakes, because these ecosystems promote rapid morphological diversification, and has already been demonstrated for Tanganyika cychlid fishes and Baikal amphipods. Ostracods are also very diverse in these ecosystems, with 107 candonid species described so far from Baikal, majority of them in the genera Candona Baird, 1845 and Pseudocandona Kaufmann, 1900. Here we study their morphological and molecular diversity based on four genes (two nuclear and two mitochondrial), 10 species from the lake, and 28 other species from around the world. The results of our phylogenetic analysis based on a concatenated data set, along with sequence diversity, support only two genetic lineages in the lake and indicate that a majority of the Baikal Candona and Pseudocandona species should be excluded from these genera. We describe a new genus, Mazepovacandona gen. n., to include five Baikal species, all redescribed here. We also amend the diagnosis for the endemic genus Baicalocandona Mazepova, 1972 and redescribe two species. Our study confirms an exceptional morphological diversity of Lake Baikal candonids and shows that both Baikal lineages are closely related to Candona, but only distantly to Pseudocandona.

Addeddate

2025-03-17 15:20:20

Bhl_virtual_titleid

210914

Bhl_virtual_volume

v.684 (2017)

Call number

10_3897_zookeys_684_13249

Call-number

10_3897_zookeys_684_13249

Foldoutcount

0

Genre

article

Identifier

morphologicalmo684kara

Identifier-ark

ark:/13960/s2vf941xp1s

Identifier-bib

10_3897_zookeys_684_13249

Identifier-doi

10.3897/zookeys.684.13249

Ocr

tesseract 5.3.0-6-g76ae

Ocr_detected_lang

en

Ocr_detected_lang_conf

1.0000

Ocr_detected_script

Latin

Ocr_detected_script_conf

0.9832

Ocr_module_version

0.0.21

Ocr_parameters

-l eng

Page_number_confidence

93

Page_number_module_version

1.0.5

Page_range

19-56

Pages

38

Pdf_degraded

invalid-jp2-headers

Pdf_module_version

0.0.25

Possible copyright status

In copyright. Digitized with the permission of the rights holder.

Ppi

300

Source

ZooKeys 684

Year

2017

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